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Claude Code token counting via Haiku request

April 4, 2026(((ل()(ل() 'yoav))))

Yoav reports Claude Code sometimes estimates token count by sending the context to the Haiku model and reading the token count field from the response, implying hidden internal calls that affect usage.

TIL claude-code sometimes calculates the token count for a context by sending the request to haiku model and observing the resulting token count field in the response.
(((ل()(ل() 'yoav))))
token countingimplementation detailllmclaude code

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